CN103123318A - Method for determining two-phase specific value in double-phase stainless steel - Google Patents
Method for determining two-phase specific value in double-phase stainless steel Download PDFInfo
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- CN103123318A CN103123318A CN2012105874794A CN201210587479A CN103123318A CN 103123318 A CN103123318 A CN 103123318A CN 2012105874794 A CN2012105874794 A CN 2012105874794A CN 201210587479 A CN201210587479 A CN 201210587479A CN 103123318 A CN103123318 A CN 103123318A
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Abstract
The invention discloses a method for determining a two-phase specific value in double-phase stainless steel. The method comprises the following steps of: step (1): cutting and grinding a stainless steel test sample; step (2): carrying out mechanical polishing and cleaning on a grinding surface of the stainless steel test sample; step (3): corroding the cleaned stainless steel test sample and photographing a gold-phase picture of the double-phase stainless steel in a corroded region; step (4): determining a first target phase and a second target phase, and calculating the area S1 of the first target phase and the area S2 of the second target phase; and step (5): calculating S1/S2, namely a two-phase content specific value of the double-phase stainless steel. According to the method disclosed by the invention, the determination of the occupied areas of the two phases of the double-phase stainless steel gold-phase picture realizes the rapid and accurate determination of the specific value of the phase contents of the double-phase stainless steel; and compared with the prior art, the method has the advantages of rapidness, high efficiency and accuracy.
Description
Technical field
The present invention relates to a kind of method of measuring two-phase ratio in two phase stainless steel, belong to the Analysis of Metallic Materials field.
Background technology
So-called two phase stainless steel refers to the stainless steel that is comprised of any two-phase in austenite, ferrite or martensite, the mensuration of two-phase ratio in two phase stainless steel, especially measure a kind of content lower be very difficult mutually, a small amount of martensite in a small amount of ferrite and ferritic stainless steel in a small amount of δ-ferrite, austenite two phase stainless steel in martensitic stain less steel for example, yet, the content of these a small amount of phases is larger on the material property impact, often needs quantitatively to determine its content.
At present, for two phase stainless steel mutually in the general normal employing chemical analysis-Atlas Method of mensuration and the magnetic instrument method of two-phase ratio.Wherein, chemical analysis-Atlas Method measuring accuracy is lower, and error is larger.Magnetic instrument method requires high to the material surface state, add that accuracy of instrument is lower, and the error of measurement result is also very large.
Summary of the invention
Problem for prior art exists the purpose of this invention is to provide a kind of method of measuring two-phase ratio in two phase stainless steel, and the method can carry out the two-phase ratio in two phase stainless steel accurately and fast measuring.
Technical scheme of the present invention is achieved through the following technical solutions:
A kind of method of measuring two-phase content ratio in two phase stainless steel comprises the steps:
Step is 1.: the stainless steel sample is cut and grinds;
Step is 2.: the abrasive surface to described stainless steel sample carries out mechanical buffing, then utilizes alcohol wash to remove the washmarking of the polished surface of described stainless steel sample;
Step is 3.: utilize Corrosion of Stainless Steel liquid that the polished surface of the stainless steel sample that cleaned is corroded, then utilize metaloscope to take the two phase stainless steel metallograph of corrosion area;
Step is 4.: determine that according to the color of described two phase stainless steel metallograph first object phase and the second target mutually, calculate the area S of first object phase
1And the area S of the second target phase
2
Step is 5.: calculate S
1/ S
2Be two-phase content ratio in two phase stainless steel.
Further, step 1. in, utilize Wire EDM that the stainless steel sample is cut.
Further, step 1. in, after the stainless steel sample is cut, utilize the sand paper of No. 100-1200 that the cut surface of described stainless steel sample is ground.
Further, step 2. in, the abrasive surface polishing of described stainless steel sample 1-2 minute.
Further, step 2. in, the abrasive surface of described stainless steel sample carries out adopting respectively in the mechanical buffing process antiscuffing paste of 2.5 μ m and 1 μ m to carry out mechanical buffing.
Further, step 2. in, after utilizing alcohol wash to remove the washmarking of described stainless polished surface, utilize hair-dryer to blow drying to polished surface.
Further, step 2. in, the abrasive surface of described stainless steel sample carries out also carrying out ultrasonic cleaning after mechanical buffing.
Further, step 3. in, described Corrosion of Stainless Steel agent is mixed by hydrochloric acid, picric acid and absolute ethyl alcohol, calculates described hydrochloric acid: picric acid: absolute ethyl alcohol=5:1:100 according to volume ratio.
Further, in described mensuration two phase stainless steel, 6. the method for two-phase content ratio also comprises step: the two phase stainless steel metallograph of choosing different corrosion areas, repeating step 4. with step 5., calculate to obtain the assembly average of two-phase content ratio in two phase stainless steel.
The present invention has realized the ratio of two phase stainless steel two phase contents is measured fast and accurately by the mensuration of two-phase area occupied in the two phase stainless steel metallograph, compared with prior art, have fast, efficiently, advantage accurately.
Description of drawings
Fig. 1 is the two phase stainless steel metallograph of step in 3. in the method for two-phase ratio in a kind of preferred mensuration two phase stainless steel of the present invention;
Fig. 2 distinguishes first object phase and the second target two phase stainless steel metallograph mutually.
Embodiment
Below in conjunction with accompanying drawing, a preferred embodiment of the present invention is described in detail.
In mensuration two phase stainless steel of the present invention, the method for two-phase content ratio comprises the steps:
Step is 1.: the stainless steel sample is cut and grinds, until the abrasive surface of described stainless steel sample does not go out cut at the metallography microscope Microscopic observation.As a preferred embodiment of the present invention, this example can utilize Wire EDM that the stainless steel sample is cut, then the sand paper that utilizes No. 100-1200 grinds the cut surface of described stainless steel sample until cannot see cut under metaloscope, and described metaloscope is preferably and can amplifies 50-100 metaloscope doubly.
step is 2.: the abrasive surface to described stainless steel sample carries out mechanical buffing, then utilizes alcohol wash to remove the washmarking of described stainless polished surface, as a preferred embodiment of the present invention, the antiscuffing paste of the present embodiment employing 2.5 μ m and 1 μ m carried out polishing 1-2 minute the abrasive surface of stainless steel sample, then utilize alcohol wash to remove the washmarking of the polished surface of described stainless steel sample, for rapid draing to avoid alcohol to leave a trace at the polished surface of stainless steel sample, the present embodiment can also utilize hair-dryer to remove alcohol residual on the polished surface of stainless steel sample, certainly, before adopting alcohol wash stainless steel sample polished surface, if there is more obstinate spot in polished surface, the present invention can also carry out ultrasonic cleaning.
Step is 3.: utilize Corrosion of Stainless Steel liquid that the stainless steel sample that cleaned is corroded, then utilize metaloscope to take the two phase stainless steel metallograph of corrosion area, metaloscope is preferably and can amplifies 200-500 metaloscope doubly.As a preferred embodiment of the present invention, described Corrosion of Stainless Steel agent is mixed by hydrochloric acid, picric acid and absolute ethyl alcohol, described hydrochloric acid: picric acid: absolute ethyl alcohol=5:1:100, those skilled in the art it should be noted that, the present invention can also be according to concrete stainless steel type, select the Corrosion of Stainless Steel solvent of other component, be not limited to the composition of the Corrosion of Stainless Steel liquid of the present embodiment.
Step is 4.: determine that according to the color of described two phase stainless steel metallograph first object phase and the second target mutually, calculate the area S of first object phase
1And the area S of the second target phase
2
Step is 5.: calculate S
1/ S
2Be two-phase content ratio in two phase stainless steel.
In mensuration two phase stainless steel of the present invention, 6. the method for two-phase content ratio also preferably includes step: the two phase stainless steel metallograph of choosing different corrosion areas, repeating step 4. with step 5., calculate to obtain the assembly average of two-phase content ratio in two phase stainless steel.
In order to make those skilled in the art can understand more clearly the method for two-phase content ratio in mensuration two phase stainless steel of the present invention, be that example is illustrated below in conjunction with martensitic stain less steel AISI410.Concrete determination step is as follows:
Step is 1.: utilize Wire EDM that martensitic stain less steel AISI410 sample is cut, then sample is ground on sample grinding machine, be ground to sand paper No. 1200 from No. 100 sand paper successively, until do not observe cut under the metaloscope of 100 times.
Step is 2.: the abrasive surface of martensitic stain less steel AISI410 sample is carried out polishing on buffing machine, the method that after the first rough polishing of described polishing employing, essence is thrown, it is 2.5 μ m antiscuffing pastes that rough polishing adopts granularity, essence is thrown and adopted granularity is the antiscuffing paste of 1 μ m, after polishing is completed, with alcohol, polished surface is carried out the washmarking of cleaning polishing face, then remove alcohol on polished surface with hair dryer.
Step is 3.: adopt Villea reagent (described Villea reagent is comprised of 5ml HCl+1ml picric acid+100ml absolute ethyl alcohol) to carry out the wiping corrosion to the polished surface of martensitic stain less steel AISI410 sample, with alcohol, it is cleaned rapidly after corrosion, it is that the metaloscope of 200 times gathers metallograph that electricity consumption dries up the rear enlargement factor of utilizing, and described metallograph as shown in Figure 1.
step is 4.: determine that according to the difference of two-phase color in described martensitic stain less steel AISI410 metallograph first object phase and the second target are mutually, for convenient the differentiation calculated first object phase and the second target area mutually, the present invention is preferably according to the color settings first object phase and the second target gray scale critical value mutually of metallograph, be processed into white by computing machine with highlighting lower than the zone of gray scale critical value in metallograph, zone higher than critical value keeps black or grey, as shown in Figure 2, in picture to demonstrate the zone that black or grey surround be the first object phase, the zone that demonstrates white is the second target phase.Then, the area of cumulative white portion obtains the area S of first object phase
1, the area of cumulative black and gray area obtains the second target area S mutually
2
Step is 5.: calculate first object phase area S
1With the second target phase area S
2Ratio, obtain two-phase content ratio 17:83 in martensitic stain less steel AISI410.
Step is 6.: the metallograph repeating step of choosing zones of different 4. with step 5., two-phase content ratio in the martensitic stain less steel AISI410 of many metallographs of calculating, the assembly average of finally trying to achieve two-phase content ratio in martensitic stain less steel AISI410 is 15:85.
Above-described embodiment is only for explanation the present invention's; and be not to be limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical solutions also should belong to category of the present invention, and scope of patent protection of the present invention should be limited by each claim.
Claims (9)
1. a method of measuring two-phase content ratio in two phase stainless steel, is characterized in that, comprises the steps:
Step is 1.: the stainless steel sample is cut and grinds;
Step is 2.: the abrasive surface to described stainless steel sample carries out mechanical buffing, then utilizes alcohol wash to remove the washmarking of the polished surface of described stainless steel sample;
Step is 3.: utilize Corrosion of Stainless Steel liquid that the polished surface of the stainless steel sample that cleaned is corroded, then utilize metaloscope to take the two phase stainless steel metallograph of corrosion area;
Step is 4.: determine that according to the color of described two phase stainless steel metallograph first object phase and the second target mutually, calculate the area S of first object phase
1And the area S of the second target phase
2
Step is 5.: calculate S
1/ S
2Be two-phase content ratio in two phase stainless steel.
2. the method for two-phase content ratio in mensuration two phase stainless steel according to claim 1, is characterized in that, step 1. in, utilize Wire EDM that the stainless steel sample is cut.
3. the method for two-phase content ratio in mensuration two phase stainless steel according to claim 1, is characterized in that, step 1. in, after the stainless steel sample is cut, utilize the sand paper of No. 100-1200 that the cut surface of described stainless steel sample is ground.
4. the method for two-phase content ratio in mensuration two phase stainless steel according to claim 1, is characterized in that, step 2. in, the abrasive surface polishing of described stainless steel sample 1-2 minute.
5. the method for two-phase content ratio in mensuration two phase stainless steel according to claim 1, is characterized in that, step 2. in, the abrasive surface of described stainless steel sample carries out adopting respectively in the mechanical buffing process antiscuffing paste of 2.5 μ m and 1 μ m to carry out mechanical buffing.
6. the method for two-phase content ratio in mensuration two phase stainless steel according to claim 1, is characterized in that, step 2. in, after utilizing alcohol wash to remove the washmarking of described stainless polished surface, utilize hair-dryer to blow drying to polished surface.
7. the method for two-phase content ratio in mensuration two phase stainless steel according to claim 1, is characterized in that, step 2. in, the abrasive surface of described stainless steel sample carries out also carrying out ultrasonic cleaning after mechanical buffing.
8. the method for two-phase content ratio in mensuration two phase stainless steel according to claim 1, it is characterized in that, step 3. in, described Corrosion of Stainless Steel agent is mixed by hydrochloric acid, picric acid and absolute ethyl alcohol, calculate described hydrochloric acid: picric acid: absolute ethyl alcohol=5:1:100 according to volume ratio.
9. the method for two-phase content ratio according to claim 1-8 described mensuration two phase stainless steels of any one, it is characterized in that, in described mensuration two phase stainless steel, 6. the method for two-phase content ratio also comprises step: the two phase stainless steel metallograph of choosing different corrosion areas, repeating step 4. with step 5., calculate to obtain the assembly average of two-phase content ratio in two phase stainless steel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738272A (en) * | 2016-03-01 | 2016-07-06 | 贵州大学 | Method for simply and conveniently analyzing proportion between two phase ingredients of 1.4460 duplex stainless steel |
| CN106248460A (en) * | 2016-10-09 | 2016-12-21 | 江苏科技大学 | A kind of assay method of two phase stainless steel phase content |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07294438A (en) * | 1994-04-22 | 1995-11-10 | Toshiba Eng Co Ltd | Carbon content judging device |
| CN1651905A (en) * | 2005-02-05 | 2005-08-10 | 石家庄钢铁股份有限公司 | Quantitative analyzing method for non-metal residue in steel |
| CN102175191A (en) * | 2011-02-25 | 2011-09-07 | 首钢总公司 | Quantitative method for area percent of martensite-austenite (MA) island structure |
-
2012
- 2012-12-28 CN CN2012105874794A patent/CN103123318A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07294438A (en) * | 1994-04-22 | 1995-11-10 | Toshiba Eng Co Ltd | Carbon content judging device |
| CN1651905A (en) * | 2005-02-05 | 2005-08-10 | 石家庄钢铁股份有限公司 | Quantitative analyzing method for non-metal residue in steel |
| CN102175191A (en) * | 2011-02-25 | 2011-09-07 | 首钢总公司 | Quantitative method for area percent of martensite-austenite (MA) island structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738272A (en) * | 2016-03-01 | 2016-07-06 | 贵州大学 | Method for simply and conveniently analyzing proportion between two phase ingredients of 1.4460 duplex stainless steel |
| CN106248460A (en) * | 2016-10-09 | 2016-12-21 | 江苏科技大学 | A kind of assay method of two phase stainless steel phase content |
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Application publication date: 20130529 |